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Preparation method of modified biaxially oriented polyethylene glycol terephthalate film

A technology of polyethylene terephthalate and biaxial stretching, which is applied in the field of plastic films, can solve the problems of cost increase, coating process increase, attenuation, etc., to reduce viscosity, improve printing performance, and good compatibility Effect

Pending Publication Date: 2021-10-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corona treatment is a kind of electric shock treatment, which can make the surface of BOPET film have higher adhesion, but this method has the disadvantage of timeliness, and the surface energy decays over time
Coating technology is also an effective way to improve the surface performance of BOPET film, but the increase of coating process leads to the increase of cost

Method used

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  • Preparation method of modified biaxially oriented polyethylene glycol terephthalate film
  • Preparation method of modified biaxially oriented polyethylene glycol terephthalate film
  • Preparation method of modified biaxially oriented polyethylene glycol terephthalate film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example relates to the preparation of modified BOPET film. The specific preparation includes the following steps: adding PET and anti-blocking agent to the twin-screw extruder according to the ratio of 100:0.17 and blending uniformly; cooling the drum, longitudinal stretching, and transverse stretching , winding and other steps to prepare BOPET film. The temperature of the feeding section of the twin-screw extruder is 180°C, the temperature of the melting and plasticizing section is 260°C, the die opening temperature is 260°C, the transverse stretching temperature is 80°C, and the longitudinal stretching temperature is 100°C. Then the tensile properties of the film were tested for mechanical properties, and the test results are shown in Table 1. The optical properties are shown in Table 2. Surface properties such as figure 1 shown.

Embodiment 2

[0035] This example relates to the preparation of a modified BOPET film. The specific preparation includes the following steps: adding PET, an anti-blocking agent, and a polyester imide oligomer into a twin-screw extruder according to a ratio of 100:0.17:0.1 and blending uniformly; The BOPET film is prepared by cooling the drum, longitudinal stretching, transverse stretching, winding and other steps. The polyester imide oligomer selected in this embodiment has a molecular weight of 5000 g / mol, a decomposition temperature of 400° C., and the blocking agent is silica microspheres. The temperature of the feeding section of the twin-screw extruder is 180°C, the temperature of the melting and plasticizing section is 260°C, the die opening temperature is 260°C, the transverse stretching temperature is 80°C, and the longitudinal stretching temperature is 100°C. Then the tensile properties of the film were tested for mechanical properties, and the test results are shown in Table 1. T...

Embodiment 3

[0039]This example relates to the preparation of modified BOPET film. The specific preparation includes the following steps: adding PET, anti-blocking agent, polyesterimide oligomer) to the twin-screw extruder according to the ratio of 100:0.17:0.25 and blending evenly ; Cool the drum, longitudinal stretch, transverse stretch, winding and other steps to prepare BOPET film. The polyester imide oligomer selected in this embodiment has a molecular weight of 5000 g / mol, a decomposition temperature of 400° C., and the blocking agent is silica microspheres. The temperature of the feeding section of the twin-screw extruder is 180°C, the temperature of the melting and plasticizing section is 260°C, the die opening temperature is 260°C, the transverse stretching temperature is 80°C, and the longitudinal stretching temperature is 100°C. Then the tensile properties of the film were tested for mechanical properties, and the test results are shown in Table 1. The optical properties are sh...

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Abstract

The invention discloses a preparation method of a modified biaxially oriented polyethylene glycol terephthalate film. The preparation method comprises the following steps: adding an anti-blocking agent into a polyethylene glycol terephthalate matrix in the form of master batch; adding a polyester imide oligomer into the polyethylene glycol terephthalate matrix in the form of powder or master batch; and uniformly blending the anti-blocking agent, the polyester imide oligomer and polyethylene glycol terephthalate through a screw extruder, and performing cooling in a rotary drum, longitudinally stretching, transversely stretching and rolling to obtain the film. According to the modified BOPET film, the processing energy consumption can be reduced, and meanwhile, the mechanical, optical and surface properties of the BOPET film are improved.

Description

technical field [0001] The invention belongs to the technical field of plastic films, and relates to a method for preparing a modified biaxially oriented polyethylene terephthalate film; in particular, it relates to an improvement that can improve the printing performance of a BOPET film without affecting the preparation process of the film. A preparation method for properties of biaxially stretched polyethylene terephthalate film. Background technique [0002] Biaxially oriented polyethylene terephthalate film has an important application in the packaging field due to its excellent mechanical properties and high heat resistance temperature. However, PET is a non-polar polymer with low surface energy, so the printing performance of BOPET film is poor. [0003] In order to improve the printing performance of BET film, corona and coating are the two most commonly used methods at present. Corona treatment is a kind of electric shock treatment, which can make the surface of BO...

Claims

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Application Information

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IPC IPC(8): B29C48/08B29C48/92B29C55/14C08L67/02C08L79/08C08K7/18C08G73/16C08J5/18
CPCB29C48/0018B29C48/08B29C48/92B29C55/143C08J5/18C08G73/16B29C2948/92704C08J2367/02C08J2479/08C08K7/18
Inventor 童刚生朱新远熊书强何紫东罗开举祝瑞华
Owner SHANGHAI JIAO TONG UNIV
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